/// <summary>
/// The action to perform.
/// </summary>
/// <param name="chatState">The current chat state.</param>
private void Action(Chat.ChatHttptState chatState)
{
try
{
// Select the member to execute.
switch (chatState.ExecutionMember.ToUpper())
{
case "DATA":
// SendMessage
SendMessage(chatState);
break;
default:
throw new Exception("Command not recognised.");
}
}
catch (Exceptions.ErrorCodeException exc)
{
// Get the error code.
chatState.ErrorCode = exc;
}
catch (Exception ex)
{
// Internal error.
chatState.ErrorCode = new Exceptions.ErrorCodeException(ex.Message, 500);
}
}
/// <summary>
/// SendMessageToClients
/// </summary>
/// <param name="chatState">The current chat state.</param>
/// <param name="serviceNameSendTo">The service name the unique identifiers are connected to.</param>
/// <param name="sendTo">Send the data to.</param>
/// <returns>True if error; else false.</returns>
private bool SendMessageEx(Chat.ChatHttptState chatState, string serviceNameSendTo, string[] sendTo = null)
{
bool isError = true;
System.Web.HttpRequest request = chatState.HttpContext.Request;
System.Web.HttpResponse response = chatState.HttpContext.Response;
// If content exists.
if (request.ContentLength > 0)
{
MemoryStream sendBuffer = null;
try
{
// Read the request stream and write to the send buffer.
sendBuffer = new MemoryStream();
bool copied = Nequeo.IO.Stream.Operation.CopyStream(request.InputStream, sendBuffer, request.ContentLength, base.RequestTimeout);
// If all the data has been copied.
if (copied)
{
// Send the data to client(s) on this machine
// and another machine if not on this machine.
Common.Helper.SendToReceivers(chatState.Member.UniqueIdentifier, base.ServiceName, serviceNameSendTo, sendTo, sendBuffer.ToArray());
isError = false;
}
}
catch (Exception ex)
{
// Internal error.
isError = true;
chatState.ErrorCode = new Exceptions.ErrorCodeException(ex.Message, 500);
}
finally
{
// Dispose of the buffer.
if (sendBuffer != null)
{
sendBuffer.Dispose();
}
}
}
// True if error else false.
return(isError);
}
/// <summary>
/// Send the message to the client.
/// </summary>
/// <param name="chatState">The current chat state.</param>
/// <returns>True if error; else false.</returns>
private bool SendMessage(Chat.ChatHttptState chatState)
{
System.Web.HttpRequest request = chatState.HttpContext.Request;
System.Web.HttpResponse response = chatState.HttpContext.Response;
// Get the header data.
string[] sendTo = null;
string serviceName = request.Headers["FSN"];
// If header send to.
if (!String.IsNullOrEmpty(request.Headers["SENDTO"]))
{
sendTo = request.Headers["SENDTO"].Split(new char[] { ';' }, StringSplitOptions.None);
}
// If sending from a query.
if (request.QueryString != null)
{
// If header from service name.
if (!String.IsNullOrEmpty(request.QueryString["FSN"]))
{
serviceName = request.QueryString["FSN"];
}
// If query send to.
if (!String.IsNullOrEmpty(request.QueryString["SENDTO"]))
{
// Get the send to query from base64 encoding.
byte[] sendToBytes = Convert.FromBase64String(request.QueryString["SENDTO"]);
string sendToString = Encoding.Default.GetString(sendToBytes);
sendTo = sendToString.Split(new char[] { ';' }, StringSplitOptions.None);
}
}
// Return the result.
return(SendMessageEx(chatState, serviceName, sendTo));
}
/// <summary>
/// Validate the current user token.
/// </summary>
/// <param name="chatState">The current chat state.</param>
/// <returns>True if valid; else false.</returns>
private bool ValidateToken(Chat.ChatHttptState chatState)
{
string uniqueIdentifier = null;
string token = null;
try
{
uniqueIdentifier = chatState.HttpContext.Request.Headers["FUI"];
token = chatState.HttpContext.Request.Headers["TOKEN"];
// If sending from a query.
if (chatState.HttpContext.Request.QueryString != null)
{
// If header from unique identifier.
if (!String.IsNullOrEmpty(chatState.HttpContext.Request.QueryString["FUI"]))
{
uniqueIdentifier = chatState.HttpContext.Request.QueryString["FUI"];
}
// If header from token.
if (!String.IsNullOrEmpty(chatState.HttpContext.Request.QueryString["TOKEN"]))
{
token = chatState.HttpContext.Request.QueryString["TOKEN"];
}
}
}
catch (Exception)
{
// Bad request exception.
throw new Exceptions.ErrorCodeException("Invalid Request.", 400);
}
// If the unique identifier
// has not been set then the
// token has not been verified.
if (String.IsNullOrEmpty(chatState.Member.UniqueIdentifier))
{
// Is token valid.
_token.IsValid(uniqueIdentifier, base.ServiceName, token, (result, permission, state) =>
{
Chat.ChatHttptState stateChat = null;
try
{
// Get the state chat.
stateChat = (Chat.ChatHttptState)state;
// If the token is valid.
if (result)
{
// Set the current unique identifier
// and the service name.
stateChat.Member.ServiceName = base.ServiceName;
stateChat.Member.UniqueIdentifier = uniqueIdentifier;
// Perform the action.
Action(stateChat);
}
else
{
// Bad request.
stateChat.ErrorCode = new Exceptions.ErrorCodeException("The token is not valid.", 400);
}
}
catch (Exception ex)
{
// Internal error.
stateChat.ErrorCode = new Exceptions.ErrorCodeException(ex.Message, 500);
}
}, uniqueIdentifier, chatState);
// Return false not valid.
return(false);
}
else
{
// Perform the action.
Action(chatState);
// Token is valid.
return(true);
}
}
/// <summary>
/// Http context handler.
/// </summary>
/// <param name="context">The http context.</param>
public override void HttpContext(HttpContext context)
{
System.Web.HttpRequest request = null;
System.Web.HttpResponse response = null;
bool isServerError = false;
bool keepAlive = true;
bool isError = true;
try
{
request = context.Request;
response = context.Response;
// If headers exist.
if (request.Headers != null)
{
// Get the execution member.
if (!String.IsNullOrEmpty(request.Headers["Member"]))
{
// Get the execution member.
// Set the calling member.
string executionMember = request.Headers["Member"].Trim();
response.AddHeader("Member", executionMember);
response.AddHeader("ActionName", request.Headers["ActionName"]);
// Create the chat state.
Chat.ChatHttptState chatState = new Chat.ChatHttptState()
{
HttpContext = context,
Member = new Net.Http.HttpContextMember(context),
ExecutionMember = executionMember,
ErrorCode = new Exceptions.ErrorCodeException("OK", 200)
};
try
{
// Validate the current user token.
bool isTokenValid = ValidateToken(chatState);
}
catch (Exceptions.ErrorCodeException exc)
{
// Get the error code.
chatState.ErrorCode = exc;
}
catch (Exception ex)
{
// Internal error.
chatState.ErrorCode = new Exceptions.ErrorCodeException(ex.Message, 500);
}
// Send a message back to the client indicating that
// the message was recivied and was sent.
CreateResponse(response, true, chatState.ErrorCode.ErrorCode, statusDescription: chatState.ErrorCode.Message);
isError = false;
}
}
else
{
// No headers have been found.
keepAlive = false;
throw new Exception("No headers have been found.");
}
// If error has occured.
if (isError)
{
// Send an error response.
response.StatusCode = 400;
response.StatusDescription = "Bad Request";
response.AddHeader("Content-Length", (0).ToString());
response.Flush();
}
}
catch (Exception) { isServerError = true; }
// If a server error has occured.
if (isServerError)
{
// Make sure the response exists.
if (response != null)
{
try
{
// Send an error response.
response.StatusCode = 500;
response.StatusDescription = "Internal server error";
response.AddHeader("Content-Length", (0).ToString());
response.Flush();
}
catch { keepAlive = false; }
}
}
// If do not keep alive.
if (!keepAlive)
{
// Close the connection.
if (response != null)
{
try
{
// Close the connection.
response.Close();
}
catch { }
}
}
}
